DWORAK, E. Assessment of Innovation Gap between Poland and European Union Countries. Olsztyn Economic Journal, [S. l.], v. 11, n. 1, p. 29–44, 2016. DOI: 10.31648/oej.2879. Disponível em: https://czasopisma.uwm.edu.pl/index.php/oej/article/view/2879. Acesso em: 23 may. 2022.